Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10.2 9/5/84; site reed.UUCP
Path: utzoo!watmath!clyde!cbosgd!ihnp4!mhuxn!mhuxr!mhuxt!houxm!vax135!cornell!uw-beaver!tektronix!reed!kehoe
From: kehoe@reed.UUCP (Dave Kehoe)
Newsgroups: net.cycle
Subject: Re: 750k tran problem
Message-ID: <1395@reed.UUCP>
Date: Sat, 27-Apr-85 15:49:47 EDT
Article-I.D.: reed.1395
Posted: Sat Apr 27 15:49:47 1985
Date-Received: Sun, 28-Apr-85 23:45:44 EDT
References: <33000001@siemens.UUCP>
Reply-To: kehoe@reed.UUCP (Dave Kehoe)
Distribution: net
Organization: Reed College, Portland, Oregon
Lines: 31

Excuse me for posting this to the newsgroup rather than replying
directly to Mr.Siemens, but I suspect that other users would like
to know the basics of troubleshooting a transmission problem.
I won't quote his article, rather I'll go directly into mine.

     I know a fair amount about motorcycle transmissions,
having put a new one into my 1972 CB450.  To help you, you'll
have to describe your problems more clearly: "something seems
to be grinding" doesn't say much.  Does your transmission:
  1) not go into a certain gear?
  2) slip out of a certain gear? (The RPMs will suddenly shoot up.)
  3) Is the problem with one gear or all of the gears?
  4) Does the clutch not fully engage (i.e. slip when riding hard) or
  5) Does the clutch not fully disengage (i.e. in first gear, with
the clutch lever pulled in, the bike shouldn't creep forward)?

     You say that the problems occur only at high RPMs.  That implies
that something may be loose -- engines vibrate *a lot* at high RPMs
and so anything that's not bolted down very tight will move around.
     If the problem occurs with a certain gear (e.g. 2nd, or 3rd),
then the problem is in the transmission.  You'll need a new pair of
gears, a new shifter fork, maybe a new shifter drum.  I.e. $100 and
a long weekend of work.
     If the problem occurs in all gears, the problem is not in the
transmission, but in the gear shifter or clutch.  Both are easy to
work on, and a new gear shifter is cheap (~$20).  I'm not sure what
new clutches cost, but installing one shouldn't take more than an
hour or two.
     My guess is that you need new clutch plates, but that's just
a shot in the dark until you describe the problem in more detail.
Have you tried adjusting the clutch?